This subproject is one of many research subprojects utilizing theresources provided by a Center grant funded by NIH/NCRR. The subproject andinvestigator (PI) may have received primary funding from another NIH source,and thus could be represented in other CRISP entries. The institution listed isfor the Center, which is not necessarily the institution for the investigator.Impaired neurodevelopmental outcome has been observed for survivors of neonatal heart surgery for congenital heart defects. There is prior evidence indicating the importance of preoperative cerebral well-being on the observed outcome. Furthermore, it is well known that the surgical parameters which include cardiac by-pass, deep-cooling and arrest need to be optimized via real-time, bed-side monitoring. A crucial parameter that is largely inaccessible is the cerebral blood flow (CBF). We have recently developed diffuse correlation spectroscopy (DCS) for non-invasive, continuous measurement of relative CBF. The primary objective of this work isto measure vasoreactivity of cerebral hemodynamics in neonates using DCS.
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